Corrugated box-board.



w. G. GHAPIN.

v GORBUGATBD BOX BOARD.

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'918,964, Patented Apr.20, 1909.

WILLIAM G. CHAPIN, OF BROOKLYN, NEW YORK.

CORRUGATED BQX-BOARD...

Specification of Letters Patent.

Application filed March 11, 1908.

Patented April 20, 1909.

Serial No. 420,366.

To all whom 'it may concern:

Be it known that I, WILLIAM G. CIIAPIN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have inve'nted certain new and useful Improvements in Corrugated Box- Boards, of which the following is a specification. v

The immediate object of this invention is to provide effective, and reasonably cheap, means for stifi ening so-called corrugated boards, of theclass now commonly used in the manufacture of boxes, cartons, clothboards, photo-mailing wrappers, and analogous articles; my present aim being to produce an exceptionally stifl' and strong package of light weight.

My said` improvement is clearly` illustrated in the annexed drawings, Figure 1 being a plan view of a box or cover b ank reinforced according to my present plan, and Fig. 2 is a 'sectional view .of the 'same taken on line 2-2. Fig. 3 is a Perspective view of said box or cover as it appears when completed. Fig. 4 is a Perspective view, artly in section, of a portion of a reinforced ox blank. Fig. 5 shows a section of corrugated board having a stifiening strip that is somewhat narrower than the depth of the box or cover for a purpose hereinafter explained, and in Fig. 6 1 ave illustrated, in section, a Similar piece of board having the stiffening strip secured to the edge of said board by overlapping strips of aper or cloth.

he material which I preferably make use of is double lined" corrugated board, sub-f stantially of the form illustrated in the accompanying drawings, and indicated therein to the Width of the reinforcing strip 1 1 whichlatter is then inserted in the saw kef (completely-filling said kerf) and is secured therem by glue, Wire sta'ples or other inexpensive means. In the case of boxes and covers, or l of flat boards for mailing photos, calendars and the like articles, I preferably reinforce and stifi`en all of the four edges of the board; the box or cover blanks being then properly scored, cornered, broken up, and wired, or otherwise stayed, at the corners, as seen at 12 in Fig. 3 of the drawings. If desired, the reinforced edges may be completely hidden from sight by cover apers.

In the sli'ght modi cation of my invention illustrated in Fig. 5 of` the drawings the reinforcing strip 11 is of less Width than the depth of the box or cover, as the case may be and is somewhat thinner than the corrugated skeleton, so that, when the coverpapers are secured to saidstrp, the edge portion of the reinforced sheet is thinner than the body portion, this construction being desirable in covers or boxes that are to be nested for shi ment. l

In the modfication of Fig: 6 the stiffening strip abuts the edge of the double-faced corrugated board and is secured to said board, so that it forms an extension thereof, by special binding strips 12 which, if so desired, ma be of cloth, thus adding to the strength an stifl'ncss of the edge ortion of the board. This construction may a so be utilized to provide an edgeportion that is relatively thinner than the body of the board. The stiflen- ,ing strips 11 may be of Wood, heavy cardboard or other cheap material that is relatively stifer than the corrugated board.

Said stri s add but little to the cost yet they' effectua y prevent the cutting in of strings and also render such reinforced boards capable of withstanding great crushing and breaking strains and, in most instances, obvate the necessity of crating boxes and cartons embodying my described improvement. F

Having thus described my invention I claim:-

1. In combination with a double-faced corrugated board having the corrugated skeleton cut away substantially as described, a stiifening strip of relatively stifi'er material inserted between the opposing facing Sheets and occupying the space formed by the cutting away of the skeleton.`

2.` In combination with a double-faced corrugated board having the said facing extended beyond' the corrugated skeleton, a stiffening strip of relatively stifi'cr material located and secured between said facings and abutting against the skeleton.

3. In c'ombination with a double-faced i. pying the place of the removed portion of the corrugated board having the corrug'at'ed skel l corrugated skeleton and relatively stiifer ma- 10 eton cut away substantially as described, a terial-abuttin the board and means for sestrip of relatively stiffer material inserted b ecuring the sai corrugated board, and stffentween the opposing facing Sheets and occu-* ing strip together. I Skeleton; said strip being of the same thiok- WILLIAM CHAPIN' ness as the corrugated skeleton. Witnesses:

4. In combinaton with a double faced cor- MARTIN H. DAY,' rugated board, a strip of the thickness of the GEORGE `J. RIEGLER. 

